Cipher Attack vs CipherStreet

Six ways to play. One goal: crack the code. From a quick daily challenge to live 1v1 duels — there's a mode for every agent. Daily Operation A new code every day, the same for every player worldwide. Compete on the global leaderboard and compare your performance. 1 challenge / day Against the Clock 120 seconds on the clock. Crack as many codes as possible before time runs out — every second counts in the global rankings. Infinite Loop No time limit. Keep cracking codes and build your longest streak ever. How far can you go? 1v1 Duel Generate a challenge code and send it to a friend. Both crack the same code , whoever uses fewer attempts and time wins. Async friend duel Online Match Get matched against a random opponent in real time. No friends needed — just your wits. A bot steps in if no one is available. Live ranked match and much more. How to Play Simple rules. 1. The Secret Code A random 4-digit code is generated. No repeating digits. The first digit is never 0. 2. Make a Guess Enter your 4-digit guess. You have 10 attempts to crack the code. 3. Read the Feedback + = correct digit in the right position. − = correct digit, wrong position. 4. Use Power-ups You can reveals a hidden digit. Or hit to button to grant 1 extra attempt. Both require watching a short ad.

CipherStreet is a story-driven puzzle game where every level is a real cryptographic cipher - from Caesar shifts to RSA public keys - wrapped in a cold-war spy thriller. Intercept encoded messages. Decode them with on-screen tools you discover, not tutorials you sit through. Unlock fragments of a decades-spanning conspiracy with every cipher you crack. By the end of ten chapters you'll have genuinely internalised the foundations of modern cryptography - roughly the first four weeks of a university course — without a single lecture. THE STORY A defector known only as The Architect has built a private intelligence network hidden inside ever more sophisticated ciphers. Your handler, Agent Kovács, sends each intercept with minimal context and maximum urgency. A mole. A missing codebook. A name that keeps reappearing across fifty years. Crack the codes before dawn. TEN CHAPTERS, TEN REAL CIPHERS • Caesar cipher: frequency analysis • Vigenère: the pattern inside the pattern • Rail Fence: transposition • Enigma (simplified): the crib attack that broke a war • Playfair: grid geometry • One-Time Pad: the perfect, unbreakable lock • Diffie-Hellman: sharing a secret in public • RSA: math as a lock • Hash functions: integrity, not secrecy • Steganography: messages hidden in plain sight WHAT MAKES IT DIFFERENT • Learn by doing: tools are discovered through play, never explained at you • Real, historically accurate cryptography, all running offline on your device • A genuine spy narrative with characters, twists, and a finale that recasts everything • No punishing fail states: get a cipher wrong and the story simply waits • Build and share your own encrypted intercepts; challenge friends to crack them FREE TO START Chapters 1–2 are completely free, no account required. A single one-time purchase unlocks chapters 3–10 and every cipher type in the Builder. No ads. No subscriptions. No tracking. The cipher is never the weakest link. The human always is.